Statistics question and answers for August 24, 2023
- Q A) Mean sales per week exceeds 41.5 per salesperson.   Ho: mu=41.5    HA: mu.>41.5    bar over x=51.02     n=100     mu0=41.5     Square root of 100=10t=51.02-41.5 / 6.8 square root 10051.02-41.5/6.8 / square root 100CI =( 50.17, 52.83)Bar over X...
- Q One way to understand the strength of the correlationcoefficient is to take the absolute value and then see how close itis to 1. The reason that makes it easier for...
- Q Segment profitability Calculation(Please show both the calculation process and the finalanswer)Q1 What is the margin ($ dollar value) of each segment(experientials, indulgents and frugals) per customer per year forRed Lobster...
- Q Throughout the course, you have studied and used tools andtechniques that have underlying statistical theory and assumptions.Regression is no different. Haphazard application of regressionanalysis, as with any type of statistical...
- Q PROJECT 3 INSTRUCTIONS Based on Brase & Brase: sections6.1-6.3 Visit the NASDAQ historical prices weblink. First, set thedate range to be for exactly 1 year ending on the Monday that...
- Q In a​ study, researchers wanted to measure the effect of alcoholon the hippocampal​ region, the portion of the brain responsiblefor​ long-term memory​ storage, in adolescents. The researchersrandomly selected 21 adolescents...
- Q A multiple regression equation of quality of life scale (0-100,100 is best) associated with Age (year), Income (unit US $), CD4count from 695 Africa HIV infected women isThe quality of...
- Q Recent studies of the private practices of physicians suggestedthat the median and mean length of each patient visit was 25minutes. A random sample of 17 visits to physicians in a...
- Q The HR Department of Vanderizing Bulb Company wanted to know ifamong its salaried employees there was a relationship between yearsof school and annual compensation. A random sample of employeesyielded the...
- Q A restaurant has terrible on-line ratings. The manager tabulatesthe complaints mentioned in the reviews. These are the 10complaints; create a Pareto analysis of the data using Minitab.ComplaintCountParking Difficult49Small Portions6Wait time156No...
- Q I was given a sample data set of systolic blood pressures andwas asked to 1.) calculate: the mean, median, standard deviation,interquartile range and 2.) applied what I have learned in...
- Q The Boston Bulb Company produces high-cost bulbs for expensiveprojection equipment. Johnson, the CEO, claims that a particularbulb type has an average life of at least 600 hours.Fourteen of these bulbs...
- Q Suppose the following linear probability modelY = 0.708 + 0.201M, n=1,989, R2=.049.(0.018) (0.020)Where y=1 if mortgage approved, M=1 if men, etc.1. What is the probability of mortgage approval for a...
- Q Question 1a) For the data in Homework 2, Question 1Size (Xi)121518212427Price (Yi)608575105120110a) calculate the ANOVA table. Use the ANOVA Table to conduct anF-Test to see if the model is significant...
- Q Kevlar epoxy is a material used on the NASA space shuttles.Strands of this epoxy were tested at the 90% breaking strength. Thefollowing data represent time to failure (in hours) for...
- Q 205327189205148139178157188301195185164182201248298264177169174169155188194192177189188176158305248189209159202177278268166285249203199170165180201209301188165173183206202283207156Create Frequency table ( with intervals, frequency, relativefrequency, and cumulative relative frequency )
- Q Discuss the three measures of central tendency. Give an examplefor each that applies to the measure to employee evaluation /rating and discusses how the measure is used. What are theadvantages...
- Q Using your own words explain the meaning of the globalsignificance test. Show how the null and alternative hypothesis aresetup, the F test and what the critical value for this test...
- Q Total plasma volume is important in determining the requiredplasma component in blood replacement therapy for a personundergoing surgery. Plasma volume is influenced by the overallhealth and physical activity of an...
- Q Please walk me through SPSS to answer this question, NOT justanswer it but please show me how you did it on SPSS...Consider the data below of inches of rainfall per...
- Q 2 girls have 25 outfits each. Each girl has one and only oneoutfit that matches the other girls. What is the probability thatthe girls wear matching outfits twice in 21...
- Q According to literature on brand loyalty, consumers who areloyal to a brand are likely to consistently select the sameproduct. This type of consistency could come from a positivechildhood association. To...
- Q I flip a fair coin and recorded the result. If it is head, Ithen roll a 6-sided die: otherwise, I roll a 4-sided die and recordthe results. Let event A...
- Q Consider the hypotheses shown below. Given that x over bar (x)equals 112​, sigma (standard deviation) equals 26​, n equals 40​,alpha (a) equals 0.05​, complete parts a and b. Upper H...
- Q Find the following probabilities based on the standard normalvariable Z. (You may find ituseful to reference the z table.Round your answers to 4 decimal places.)a.P(Z > 1.18)b.P(Z ≤ −1.68)c.P(0 ≤...
- Q How do we check whether the data collected in a research projectcomes from a Normal distribution?
- Q Use R and perform following:Generate 1000 observations from an exponential distribution withmean 10.Generate 1000 observations from a central t-distribution with 8degree of freedom.Make a qqplot of observations in problem 1...
- Q Briefly explain the difference between range, interquartilerange, and standard deviation.
- Q Discuss a management decision-making perspective for \"concept ofmoving average and its use\" with detailed examples.
- Q What is the main reason for using covariance analysis in arandomized study?
- Q In essay format, give a detailed explanation of linearregression, talking about what it is, its origin, mathematicaljustification, and formulas that make up the method.References
- Q A customer wants to estimate the average delivery time of apizza from the local pizza parlor. Over the course of a few months,the customer orders 28 pizzas and records the...
- Q Based on historical data, your team knows what proportion of thecompany's orders come from Males (and Females). However, your teamwould like to expand its sales so that men are more...
- Q A head librarian supervises a number of libraries in a largecounty. He wants to know if full-time library workers and part-timelibrary workers re-shelve books at the same rate. So, he...
- Q A Sleep researcher coducts an experiment to determine whethera hypnotic drug called Drowson, Which is advertised as a remedy forinsomnia, Actually does promote sleep. In addition, the researcheris interested in...
- Q The posterior probabilities of four hypothesis h1,h2,h3,h4 are(0.2, 0.5,0.2, 0.1) respectively. A new training sample isclassified +ve by h2 and h3, while h1 and h4 classify the same datainstance as...
- Q You wish to determine whether consumers have made substantialprogress in reducing their credit card debt? Based on a sample of1000 consumers in September 2001, and another sample of 1000customers in...
- Q When research does not go as planned, what informationcan be gained from the results?*please give a different answer from what is already on thissite.
- Q An agent for a residential real estate company in a large cityhas the business objective of developing more accurate estimates ofthe monthly rental cost for apartments. Toward that goal, the...
- Q Do this one by hand. Suppose we measured the height of 5,000 menand found that the data were normally distributed with a mean of70.0 inches and a standard deviation of...
- Q Jorge was at the park playing with friends. He found a typicaldie with 6 sides on the ground. He took it home and rolled it 100times and recorded the results...
- Q Align two sequences shown below using Needelman Wunschalgorithm. Use match score of 3, mismatch score of -3 and gappenalty score of 2 (note, you should subtract this from the scoringfunction).Show:a)...
- Q Given that is a standard normal random variable, compute thefollowing probabilities. Round your answers to 4 decimalplaces.a.) P(-1.54 ≤ z ≤ 0)b.) P(z > 0.32)c.) P(z ≤ -0.63)
- Q Betty DeRose, Inc. operates two departments, the handling department andthe packaging department. During April, the handling department reportedthe following information: ...
- Q Clinical trial(a) There are several methods to assign treatments to patientsin comparative clinical trials. Commonly used methods include purerandomization ,permutted blocks and within strata.Briefly describe each of these technique for...
- Q Suppose X and Y are the scores that a student will receive,respectively, on the verbal and math portions of the SAT test.Further suppose that X and Y are both Nor(700,...
- Q What price do farmers get for their watermelon crops? In thethird week of July, a random sample of 41 farming regions gave asample mean of x = $6.88 per 100...
- Q A business receives supplies of copper tubing where the supplierhas said that the average length is 26.70 inches so that they willfit into the business’ machines. A random sample of...
- Q In the late summer of 2008, a brief war broke out between thetwo countries—Russia and Georgia. Suppose you are a researcherinterested in nationalistic attitudes in these two countries. Youdecided to...
- Q Answer the followingquestions and upload to Canvas. Submit in Word or PDFformat.  Show your work and upload the Excel sheet aswell. All the writing parts must be your original writing, don'tquote,...
- Q chandler Oil has 5000 barrels of crude oil 1 and 10,000 barrelsof crude oil 2 available. Chandler sells gasoline and heating oil.These products are produced by blending the two crude...
- Q How much does a sleeping bag cost? Let's say you want a sleepingbag that should keep you warm in temperatures from 20°F to 45°F. Arandom sample of prices ($) for...
- Q Blood pressure: A blood pressure measurementconsists of two numbers: the systolic pressure, which is themaximum pressure taken when the heart is contracting, and thediastolic pressure, which is the minimum pressure...
- Q Photon Technologies, Inc., a manufacturer of batteries formobile phones, signed a contract with a large electronicsmanufacturer to produce three models of lithium-ion battery packsfor a new line of phones. The...
- Q Do various occupational groups differ in their diets? A Britishstudy of this question compared 86 drivers and 52 conductors ofLondon double-decker buses. The conductors' jobs require morephysical activity. The article...
- Q 5. For each of the following, determine the interval width thatwould be best for a grouped frequency distribution and identify theapproximate number of intervals needed to cover the range ofseries.A....
- Q A hat contains eight one-dollar bills and two thousand-dollarbills. A coin is tossed. If it falls heads, Bill gets to draw, atrandom, two bills from the hat. If the coin...
- Q You want to find the proportion of residents in Richmond whosupport bringing a professional sports team to the area. Of the 98people you survey, 43 of them would support a...
- Q For university, I have to write a Research paper and i want toexamine whether there is a relationship (correlation)between hoursworked in a Country per week and the Happiness Index points...
- Q TWO MEANS – INDEPENDENT SAMPLESChoose a variable from the advising.sav data set to comparegroup means. While the choice of which variable to test is up toyou, you must remember that...
- Q The scores on a standardized math test for 8th grade childrenform a normal distribution with a mean of 80 and a standarddeviation of 12. (8 points)a) What is the probability...
- Q There are 20 total socks, 10 white and 10 black. Thismakes 10 total matching pairs of 5 pair of white and 5 pair ofblack.6. What is the total probability of...
- Q Claim: there is no difference between the mean daily drivingtime for the popuation of 16-20 year old men and the mean dailydriving time for the population of men 60 years...
- Q The data in the table below (and available online) representmonthly gross sales for Ska Brewing Company from 2009 to2012.  This is real data, let’s help Skaforecast 2013…YearJanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecemberTotal9 9$193,481$170,674$228,095$232,372$288,188$304,763$337,825$342,121$320,011$304,756$221,514$235,59110$267,782$225,592$356,604$274,723$377,369$439,907$430,999$485,822$407,577$450,234$315,238$345,13511$319,313$323,726$342,353$361,315$612,500$564,599$518,422$623,860$412,091$530,636$313,034$395,68612$375,117$391,677$426,746$535,876$659,204$582,670$663,534$564,901$636,399$727,822$539,011$450,18813Slopea)Sum up the totals...
- Q Two coins are tossed. A die is thrown for each coin that fallsheads. What is the expected number of spots shown on the dice?
- Q A marketing manager for Country Kitchen Corporation (CKC), whichsells snack food product \"Nature -Bar\" in dif- ferent regions, wasinterested in how its sales (denoted Sales) are influenced by thesales of...
- Q b) Interpret the coefficients in the estimated regression modelof Sales on Csales. c) Before estimating the model, the managerclaimed that for every 1 million increase in Csales, Sales go downby...
- Q Please find the mean, mode, medium as applicable. This is datacollected based off an observational study I conducted. The datawas collected to see if male or females actively or passivelyinteracted...
- Q 8. Rollflex and Morgan Trust are two stocks traded on the NewYork Stock Exchange. For the past ten weeks, you recorded theFriday closing price (dollars per share): Rollflex: 21 20...
- Q Suppose the data shown here are the results of a survey toinvestigate gas prices. Ten service stations were randomly selectedin each city and the figures represent the prices of a...
- Q Fuming because you are stuck in traffic? Roadway congestion is acostly item, both in time wasted and fuel wasted. Let x representthe average annual hours per person spent in traffic...
- Q Small-company stocks funds are prone to periodic bursts of hotperformance. Consider the five small-company mutual funds and theirperformance, as listed below. Small-Company Performance over thePerformance over the Mutual Fund Past...
- Q Given the following table of possible values for rv Z and thenumber of possible ways that this value can occur,Construct the pmf and cdf for this rvGraph the cdfCalculate Pr(Z=6)Calculate...
- Q The probability that a certain hockey team will win any givengame is 0.3628 based on their 13 year win history of 377 wins outof 1039 games played (as of a...
- Q A study was conducted to determine if the number of hours spentstudying for an exam is associated with the exam score. Thefollowing are the observations obtained from a random sample...
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